At half an amp per fan you could hook up 24 fans in parallel.
Connect pc fan to ac adapter.
Take the two wires from the ac adapter it will not hurt it becasue it is now converted to 12v dc and just try combinations with the four wires until the fan works.
Connect your black pc axial wires to the adapters black wire.
It will give you ac.
What you need is called an ac to dc inverter.
A transformer will not give you dc.
Connect your red pc axial wires to the adapters white wire.
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Items we talk about in this video.
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Crj dc power supply for 2 x 3 4 pin 12v computer pc case fans.
It s okay to buy a power supply that can source up to 12 amps at 12vdc.
The other wires on the fan are for control and aren t needed for your purpose.
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This is an easy thing to do and should only take about a minute to hook up.
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Crj full speed 12v voltage step up usb to dual 3 pin and 4 pin pc fan sleeved power adapter cable.
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I needed to adapt a computer fan to a wall plug so i could use it in an egg incubator.
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If you search for power supply you will find many.
You can t just feed a dc motor ac.
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Take the red wire from the fan strip it a little and stick it in the hole of the adapter plug.
This simple idea saved me 37 00 over the the cost of the add on unit.